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08-05-2010, 10:02 AM
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#1 |
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Getting Wild
Join Date: Jul 2010
Posts: 75
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Main jet sizes and A/F ratio
What are the typical A/F ratios on these small engines? What should the A/F be under a load and what should it be at Idle and what should it be at cruise? should the ratio's be about the same as large (car) naturally aspirated(N/A) engines? (14.7+ at idle, 13.3-13.8 cruise, 12.0-12.8 under load) .
Not having an accelerator pump do they get jetted a bit richer? or is idle a bit richer? Thanks. Kelly |
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08-05-2010, 10:50 AM
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#2 |
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Gone Wild
 Join Date: Jul 2008
Location: Reddick IL
Posts: 11,220
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Re: Main jet sizes and A/F ratio
naturally aspirated(N/A) engines? (14.7+ at idle, 13.3-13.8 cruise, 12.0-12.8 under load) .
Not having an accelerator pump do they get jetted a bit richer? or is idle a bit richer? KZ the numbers are the same for carts and they are kind of universal across all gas powered engines. Sleds and higher revving engines will be jetted a little fat at idle to carry them through the loss of vacuum when the throttle is snaped open. |
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